/Engine/Source/Runtime/SlateCore/Public/Fonts/CompositeFont.h
struct FCompositeSubFont : public [FCompositeFallbackFont](API\Runtime\SlateCore\Fonts\FCompositeFallbackFont)
TArray<FInt32R...
CharacterRanges
Array of character ranges for which this sub-font should be used
FString
Cultures
Optional semi-colon separated list of cultures that this sub-font should be used with (if specified, this sub-font will be favored by those cultures and ignored by others)
FName
EditorName
Name of this sub-font.